libreoffice/vcl/source/window/layout.cxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * Version: MPL 1.1 / GPLv3+ / LGPLv3+
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Initial Developer of the Original Code is
 *        Caolán McNamara <caolanm@redhat.com> (Red Hat, Inc.)
 * Portions created by the Initial Developer are Copyright (C) 2011 the
 * Initial Developer. All Rights Reserved.
 *
 * Contributor(s): Caolán McNamara <caolanm@redhat.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 3 or later (the "GPLv3+"), or
 * the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
 * in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
 * instead of those above.
 */

#include <vcl/layout.hxx>
#include <boost/bind.hpp>

#define callDimension(object,ptrToMember) ((object).*(ptrToMember))()

Size Box::calculateRequisition() const
{
    long nMaxChildDimension = 0;

    sal_uInt16 nVisibleChildren = 0;

    Size aSize;
    sal_uInt16 nChildren = GetChildCount();
    for (sal_uInt16 i = 0; i < nChildren; ++i)
    {
        Window *pChild = GetChild(i);
        if (!pChild->IsVisible())
            continue;
        ++nVisibleChildren;
        Size aChildSize = pChild->GetOptimalSize(WINDOWSIZE_PREFERRED);
        fprintf(stderr, "child %p wants to be %ld %ld\n", pChild, aChildSize.Width(), aChildSize.Height());
        long nSecondaryDimension = getSecondaryDimension(aChildSize);
        if (nSecondaryDimension > getSecondaryDimension(aSize))
            setSecondaryDimension(aSize, nSecondaryDimension);
        if (m_bHomogeneous)
        {
            long nPrimaryDimension = getPrimaryDimension(aChildSize);
            if (nPrimaryDimension > nMaxChildDimension)
                nMaxChildDimension = nPrimaryDimension;
        }
        else
        {
            long nPrimaryDimension = getPrimaryDimension(aSize);
            setPrimaryDimension(aSize, nPrimaryDimension + getPrimaryDimension(aChildSize));
        }
    }

    if (nVisibleChildren)
    {
        long nPrimaryDimension = getPrimaryDimension(aSize);
        if (m_bHomogeneous)
            nPrimaryDimension += nMaxChildDimension * (nVisibleChildren-1);
        setPrimaryDimension(aSize, nPrimaryDimension + m_nSpacing * (nVisibleChildren-1));
    }

    return aSize;
}

Size Box::GetOptimalSize(WindowSizeType eType) const
{
    if (eType == WINDOWSIZE_MAXIMUM)
        return Window::GetOptimalSize(eType);
    return calculateRequisition();
}

void Box::setAllocation(const Size &rAllocation)
{
    sal_uInt16 nChildren = GetChildCount();
    if (!nChildren)
        return;

    sal_uInt16 nVisibleChildren = 0, nExpandChildren = 0;;
    for (sal_uInt16 i = 0; i < nChildren; ++i)
    {
        Window *pChild = GetChild(i);
        if (!pChild->IsVisible())
            continue;
        ++nVisibleChildren;
        bool bExpand = pChild->getChildProperty<sal_Bool>(rtl::OString(RTL_CONSTASCII_STRINGPARAM("expand")));
        if (bExpand)
            ++nExpandChildren;
    }

    if (!nVisibleChildren)
        return;

    sal_Int32 nLeftBorder, nTopBorder, nRightBorder, nBottomBorder;
    GetBorder(nLeftBorder, nTopBorder, nRightBorder, nBottomBorder);
    Point aPos(nLeftBorder, nTopBorder);

    Size aSize = rAllocation;

    long nHomogeneousDimension, nExtraSpace = 0;
    if (m_bHomogeneous)
    {
        long nBorder = getPrimaryDimensionBorders(nLeftBorder, nTopBorder, nRightBorder, nBottomBorder);
        nHomogeneousDimension = ( ( getPrimaryDimension(rAllocation) - nBorder -
                          ( nVisibleChildren - 1 ) * m_nSpacing )) / nVisibleChildren;
    }
    else if (nExpandChildren)
    {
        Size aRequisition = calculateRequisition();
        nExtraSpace = (getPrimaryDimension(rAllocation) - getPrimaryDimension(aRequisition)) / nExpandChildren;
    }

    for (sal_uInt16 i = 0; i < nChildren; ++i)
    {
        Window *pChild = GetChild(i);
        if (!pChild->IsVisible())
            continue;

        long nPadding = pChild->getChildProperty<sal_Int32>(rtl::OString(RTL_CONSTASCII_STRINGPARAM("padding")));

        sal_Int32 ePacking = pChild->getChildProperty<sal_Int32>(rtl::OString(RTL_CONSTASCII_STRINGPARAM("pack-type")));

        fprintf(stderr, "child packing is %d\n", ePacking);

        Size aBoxSize;
        if (m_bHomogeneous)
            setPrimaryDimension(aBoxSize, nHomogeneousDimension);
        else
        {
            aBoxSize = pChild->GetOptimalSize(WINDOWSIZE_PREFERRED);
            long nPrimaryDimension = getPrimaryDimension(aBoxSize);
            nPrimaryDimension += nPadding;
            bool bExpand = pChild->getChildProperty<sal_Bool>(rtl::OString(RTL_CONSTASCII_STRINGPARAM("expand")));
            if (bExpand)
                setPrimaryDimension(aBoxSize, nPrimaryDimension + nExtraSpace);
        }
        setSecondaryDimension(aBoxSize, getSecondaryDimension(aSize));

        Point aChildPos(aPos);
        long nPrimaryCoordinate = getPrimaryCoordinate(aChildPos);
        setPrimaryCoordinate(aChildPos, nPrimaryCoordinate + nPadding);

        Size aChildSize(aBoxSize);
        bool bFill = pChild->getChildProperty<sal_Bool>(rtl::OString(RTL_CONSTASCII_STRINGPARAM("fill")), sal_True);
        if (bFill)
            setPrimaryDimension(aChildSize, std::max(static_cast<long>(1), getPrimaryDimension(aBoxSize)-nPadding));
        else
        {
            setPrimaryDimension(aChildSize, getPrimaryDimension(pChild->GetOptimalSize(WINDOWSIZE_PREFERRED)));
            setPrimaryCoordinate(aChildPos, getPrimaryCoordinate(aChildPos) +
                (getPrimaryDimension(aBoxSize) - getPrimaryDimension(aChildSize)) / 2);
            setSecondaryCoordinate(aChildPos, getSecondaryCoordinate(aChildPos) +
                (getSecondaryDimension(aBoxSize) - getSecondaryDimension(aChildSize)) / 2);
        }

        pChild->SetPosSizePixel(aChildPos, aChildSize);
        fprintf(stderr, "child %p set to %ld %ld : %ld %ld\n", pChild, aPos.X(), aPos.Y(), aChildSize.Width(), aChildSize.Height());
        nPrimaryCoordinate = getPrimaryCoordinate(aPos);
        setPrimaryCoordinate(aPos, nPrimaryCoordinate + getPrimaryDimension(aBoxSize) + m_nSpacing + nPadding);
    }
}

void Box::SetPosSizePixel(const Point& rAllocPos, const Size& rAllocation)
{
    Window::SetPosSizePixel(rAllocPos, rAllocation);
    setAllocation(rAllocation);
}

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